Portable electric lamp.



F. M. RUSENFELD.

PORTABLE ELECTRIC LAMP. APPLICATION FILED MAR. 5, 1915.

luented Feb. 29, 1916.

3 nvewtoz A Francis M. Rosenfelcb TE ses NT OFFIC.

mmucxs M. iosnurnnn, on NEW YORK, .N. Y., ASSIGNOR 'io IMPORT SALESCOMPANY,

/ A comeomxon on NEW YORK. A

PORTABLE ELECTRIC Lam.

Application filed Match 5, 1915. Sei*ial No. 12,406.

Be it known t'lmt l. -Fnnx ns M. ROSES- FEU), a citizen of the UnitedStates, residing in the city, county, and State of New York, haveinvented certain ncw and useful 11nprovenwnts in Portable ElectricLamps, of which the following is a description.

My invention .relates to electric Ian1ps of the well-known portable 01pocket type, which are opemted by means of a dry battery contained in acasing which may be partly or Wholly metallic, and which. casingca1ries, at so1nc convenient point, a suitahle .switching mechanism foi"olosing, the lamp circuit.

One of the principal objects of my invention 1s to provide means wherebyone pole 01 the battery shall be completely insulated from the metallicportions of the casing, so that the battery caiinot be short-circuitedor 'conncction 1nade through the lamp accidentally as, for instance, bycontact et the casing, switch or portions thercof with a 1netallic body.

Fnrther objecte of my invention are to simpli1y the construction of theapparatus, thus making it cheap, easy to manufacture, and less liable todcrangement, and to provide an efficient, simple means of completing thecircuit through the lamp.

Other objects of my invention will be ;.pointed out in thisspecification andin the claims.

In the drawings accompanying this speci-' fication,I have shown inFigure 1 asi de view 'of a lamp haing a nietallic casing and emgbodymg1ny 1mp1:ovements.

In Fig. 2 I

have shown a sectional view of the lamp shown in Fig. 1. In Fig. 3 Ihave shoWn my improvements applied to a. lamp, the cas ing of which ispartly metallic and partly insulated. F ig. 4: shows a detail plan viewof the spring- Which contacts with one of -the'battery poles, and inFig. 5 I have shown a perspective view of one of the contact members towliich the sp1ing shown in Fig. 4 is connected.

Reforring to the dmwings, 1 indicates a battcry, one pole of Which,.2,is connected to a pole 3 of the lamp 4:. The othep pole of the lump isconnected to a m'ctallic reflector G. or otherwise electricallyconnected eithef to the metalli'c casing 7, if the casing is wh'ollymctallic as in Fig. 2, or to n metallic strip 8 if the casing is partlyof insu- Speeificacion of Letters Patent.

Patented Feb. 29, 191e.

lating material. the connectmn 1s madeto onehlement of the sw1tch 9. Y

4 111e detaxls of the spec1fic smtch mechamsm 1llustrated 111 F 1g. 8are fullv shown and descmbed 111 mv Patent No. 1.151.130. bept. 21,1915, 101: c1rcu1t-closing douces, t0 wlncl reterence 1s made for afuller de.- scmptmn.

The other pole 'of the battery 1, which in ber 11 and is preferablyformed With a beV-' eled edge for a purpose which Will be herc-1naf'te1: descnbed Hember 11 has formed upon 1t a plurality' of upturnedcars 16,

Which are perforated to enable the spring to be passed therethrough, asshown in Fig. 4, thus holding the insulating disk 15 in place duringassembling.

It Will thus be .seen that While pole 2 *of the battery is connected tometallic portions of the casing, the other pole of the battery isentirely insnlated therefrom, so that it is impossible to-short-circuitthe battery or close the lamp circuit without operating the switch.

The casing 0f battery 1 is, as is usual, in sulated from the lamp casingby means of an insula.ting covering 17, and, if desired for additionalsecurity, a second insulating covering 18 (Fig. 3) may be used.

In the modification shown in Fig. 2, the switch 9 operates in a slot 19formed in the battery casing, so that it may be longitudinally slidthereon: Connected to the switch 9 is an extension 20, Which is thselectrically connected to the metallic casing 7, and, through it, to thebattery pole 2. \Vhen switch 9 is slid longitudinally toward the rear ofthe lump, extension 20 will ride up the bevel of insulating disk 15 andmake contact with the edge of metallic member 11. If desired, themetallic member 11 may be so proportioned and the extension 20 s0 Ineither event, however,,

formed that movement of the extension 20 to the limit of its movementWill cause the end of extension 20 to enter 1n the space betWeen theedge of metallic member 11 and.

is provided. In this case a movement of the switch 9 in a forwarddirection will cause connection to be made between the two poles of thebattery through the lamp 4.

In either modification, however, accidental short-circuitin, of thebattcry or closingof the lump ciucuit is prevented by the provision ofthe means described for completely insulating One of thc battery polesfrom the metallic portions 0f the cas- 1ng.

hile I have only shown une form of my invention, I do not intend tolimit myself thereto, as it will be evidcnt tu those skilled in the artthat many modifications may be made without departing from the spirit ofmy invention.

What I claim is:

' 1. In a device of the character described,

a metallic casing, a battery Inonnted there .111, a lamp mounted at oneend of the casmg and electrically connccted thereto and to one polo ofthe battcry, a cap detachablymounted at theother end of the casing, adisk secured to and insulated irom said cap and clectricall cohnectcd tothe other polo of the battery when the cap is in position, and acondnctor slidably xnounted within the cusillg and elcctricall connectedtherewith and adapted When operated to contact with said disk tocomplete the circuit through the lamp; r

2. In a devi of the character described, a metallio casing, a batterymounted there in, a lamp mounted at one end of the casing andelectrically connected thereto and to one ple of the battery, a capdetachably mountcd at the other end'of the casing, a disk secured to andinsulated from said cap, a:spring Connectedto said disk and adapted toform an electric connection betwen said disk and the other pole of thebattery when the cap is in position, and a conductor slidably mountedWithin the casing and electrically connected therewith and adapted whenoperated to contact with said disk to complete the circuit through thelump.

3. In a device of the character dscribed, a metallic casing, a batterymounted therein, a lamp mounted at one and of the casing andelectrically connected thereto and to connected therewith and adaptedwhen op-' erated to contact with said clament to complete the circuitthrough the lamp.

4. In a device of the character described,.

a metallic casing, a battery mouncdctherein, a lamp mounted at one endof the casing and electrically connected thereto and to One polo of thebattery, a cap detachably mounted at the other end of the casing, a conducting element carried by said cap, an insulator interposed betweensaid element and said cap, a spring held in position by said clament andelectrically 'connected thereto and adapted to form an electricalconnection between said element and the other pole of the battery whcnthe cap is in position, and a Conductor slidably 'mounted within thecasing and electrically connected there with and adapted when 0peratedto contact with said element to complete the circuit through the lamp.

In testimony whereof I have signed this specification in the presence oftWo subscribing witnesses.

FRANCIS M. ROSENFELD.

VVitnesses:

ANNA MARIE I/VALL, M; M. RII\IAW.

